/Engine/Plugins/Experimental/Gauntlet/Source/Gauntlet/Public/GauntletTestController.h
Marks the next heartbeat as active and immediately forces a heartbeat with the given status message if one is specified. Test controllers should call this regularly as purposeful actions happens or meaningful states are achieved within the test.
void MarkHeartbeatActive ( const [FString](API\Runtime\Core\Containers\FString) & OptionalStatusMessage )